800 words is a lot to remember if. Seriously consider using a memory technique if you want to remember all 800. My technique would "toss" the 100th word. "taste" the 101st "Freeze" the 540th Joust the 601st "Fuzz" the 800th. It would take a minute or two to create the association and then play at recalling them. Something I would probably work on over a period of a few weeks working on it about 20 minutes per day. You could also use multiple ABC or make 8 100 word list. Or 4 200 word list.
In other words it's possible to remember all 800 however you need to create a system to build them into your memory web.
If you're not set on remembering them all cross off the ones you already confidently know. Make the list smaller (something I'd do anyway).
Actually if you want to improve your conversational skills PhotoRead a whole stack of books. Any books. Even novels will be great for this. Use direct learning. Have 5 or 6 books. PhotoRead them in one sitting at the end imagine yourself in the future having a conversation and someone commenting how much your conversational skills have improved. Your purpose in PhotoReading the books is simply to improve conversational skills.
See the chapter on direct learning in the PhotoReading book. Natural Brilliance book has a script and the Genius Code Course takes you through the full process.
Alex